Active Carbon/PAN composite adsorbent for uranium removal: Modeling adsorption isotherm data, thermodynamic and kinetic studies
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The aim of the present study was to produce a high capacity and steady adsorbent able to separate uranium ions resulting from the nuclear fuel cycle process at different pHs and concentrations. AC/PAN (active carbon/polyacrylonitrile) composite adsorbent was investigated in a batch system for uranium sorption as a function of pH, contact time, initial metal ion concentration, temperature and adsorbent concentration. The adsorption mechanism was described through a comparison of linear and nonlinear regression analysis. The adsorption capacity was found to be 27.47 and 28.45 mg g(-1) according to the linear and non-linear regression analysis of the Langmuir isotherm, respectively. The adsorption mechanism followed to pseudo-second-order kinetics. The thermodynamic parameters (standard enthalpy (Delta H degrees = -23.46 kJ mol(-1)), entropy (Delta S degrees = 0.02 J mol(-1) K-1), and free energy (Delta G degrees)) were determined and the results indicated that the adsorption system was exothermic, spontaneous and favorable.
Açıklama
Anahtar Kelimeler
Uranium, Waste management, Activated carbon, Composite adsorbent, Adsorption isotherm, Modeling
Kaynak
Applied Radiation and Isotopes
WoS Q Değeri
N/A
Scopus Q Değeri
Cilt
168
